expression, ichidan verb
let in fresh air; air out
Used when opening a window or door to allow fresh air into a room or space.
部屋の空気がこもっているので、窓を開けて風を入れてください。
The air in the room is stuffy, so please open the window and let in some fresh air.
換気する is a more formal or technical term for ventilation, while 風を入れる is a casual, everyday expression for letting in fresh air.
A straightforward phrase combining 風 (wind/air) and 入れる (to let in).